Yes .. v interested. The 'dark patches' are overlapping circles. I recall an earlier thread showing the new LowRes Vicki's png had a square background but, when converted to rsr, it had a round background. The explanation was that it was to do with the alpha transparency in the png being used by the rsr. If you try substituting a completely blank png for the one that Poser must use, maybe that would remove the round shadow? If you're playing with the Poser system files, maybe you can find reference to the png being used?